code: def set_extent_None_text(ax):
      ax.text(
          3,
          2.5,
          "equals\nextent=None",
          size="large",
          ha="center",
          va="center",
          color="w",
      )
  
file_path: matplotlib/galleries/users_explain/artists/imshow_extent.py
imports: import matplotlib.pyplot
  import numpy
  from matplotlib.gridspec import GridSpec
label_desc: Use image node_id 5 for calling a global function with example usage: set_extent_None_text(ax) without return types